Gas heating-furnace.



No. 654,7I9.V Patented luly 3l, |900, n. A. EBINGEB. 1 A HEATING FUBNCE H (Application filed A1471'. 8, 1899.)

(No Model.)

-BMMMQ Nrrnn STrr'rEs PATENT @Finca I'jAvID A. Eamonn, OF OOLUMBS, OI-IIO, AssIeNOn TO'TIIE voenLensANe FURNAOE COMPANY, OF snr/In PII-.Aon

-i miami-komme..

srEcIrrcATIoN forming part ofiett'ers Patent No. 654,719, 'aataruiy si, reco.

Appncaitn inea April e; 1399,A serial No. 711,970. (No modela) To '0I/ZZ whom it may concern:

Be it known that I, DAVID A. EBINGER, a citizen of the United States, residing at CO- lumbus, in the county of Franklin and State of Ohio, have invented a new and useful Im-' provement in Heating-Furnaces, of which the following is a specification.

My invention relates to a furnace; and the.

object of the invention is the provision of a very simple, durable, and cheaply-:constructed one.

The special features of this furnace are illustratedin the accompanying drawings, in which-- Figure l is a sectionalplan on the line X X" of Fig. 2, and Fig. 2 is a sectional elevation At the frontend of the furnace is a fire-pot 3o f, having perforated holes g near its top for furnishingdraft and also forcooling and preserving the fire-box against the action ofv the fuel. .At the bottom "of the fire-box is a grate h,which may be constructed of any conventional form, with necessary bars extending to the front for shaking and dumping. .Around the lire-box, on the sides and rear and connecting With the furnace-front, are Wallsj, forming the ash-pit. At the top of the furnace and directly abovethe the fire-box is an arched top, made either in one piece orin sections, according to the convenience of construction, said arched top having on its upper surface webs 7o for ,the purpose of `increasing its heating-surface. The tubes are arranged along the side and at the rear of the nre-box, those in the'rear comprising several rows,with the fines e of each alternate row staggered, so as to break the direct line of the heat from the fire-box toward the smoke-line.

The tubes e are made tapering from bottom to top, having the lower ends smaller than the upperends. Theobjectin constructingthese in tapered form is a special feature in this furnace and is intendedA to prevent downdra'fts in said lines. When the cool air en ters these tubes at the bottom, it is expanded from the heat surrounding said iiues, thus eX- panding the air and4 increasing' the volume to s'uch an extent that it will pass upward out ,of the larger end instead of being forced back by reason of any downdraft which might occur in the distributing-ducts. These ilues `are attached to the bottom and top walls of the furnace in any manner consistent with `sim ple construction. On the inner surfaces of the tubes c there are radial webs e' for increasing the heating-surface.

Connected with the furnace-wall a, at the rear end, are smoke-dues Z, connecting with the drum m, extending across the full width of the furnace at the rear, to which the smoke-fine n is connected, conveying the smoke and products of combustion tosmokestack.4 Thefdrum m is extended at one end through the walls o, surrounding the furnace, lhaving at its enda door for the cleaning out ashes or soot.

Fresh cool air is conveyed from outside' of `building through air-duct q, located, prefera- 4bly, 'at the rear end of the walls o, surround- ,ing the furnace near the floor. `has passed in beneath, through, and around After the air the furnace it passes to the chamber r above the furnace and is conveyed through outlets s, near the top of the vsurrounding walls o, to the various warm-air ducts communicating with the different portions of the building. The outlets s may be of any form or number. The surrounding walls 0 are closed at the top by brick or other insulating material and covered with sand or any suitable material, but preferably sand.

The rear end of the furnace is supported by adjustable stanchions t, which maybe of any conventional form, f

The three rear rows of tubes e are partially closed at the top by the platesfu, which are graduated in size from the rear row toward the fire-box, those in the rear row shutting purpose of and those in the third row shutting E about one-fourth of the area of the tube-openings. The object in doing this is to retain the cool air, which is conducted through the duct q at the rear, much longer in contact'within the several rows of tubes mentioned, so that` it may become heated as evenly as the air passing through the tubesje, which 'immo-f' diately surround the sides and rear of the fire-box, which, being near the hre, are heated more than those at a greater distance, thus equali'zing the temperature of the air passing through the various tubes e.

A further feature inV connection with the tube system of this furnace-is that-owing to-v the tapering form of the tubes e heating-1,

ducts may be connected to any one or more from the fire-box being provided with baffleplates in addition to the webs.

2. A furnace, comprisingan outer casing, a

re-box, top and bottom plates located above the iire-boX, and two series of vertically-disposed air-tubes passing through said plates, one series of said tubes located adjacent to Vtheftre-bozc and the other remote therefrom,

all of said tubes being provided with webs and those remote from the lire-box being provided with battle-plates also.

, 3. A furnace, consisting of an outer casing, the furnace proper arranged therein and comprising, the top and bottom plates provided with openings, a fire-box having communication with said plates, and two series of verticallydisposed j air-tubes passing through of them for the` purpose of conveying heated air where it is necessary tocarry it long dis-- tances andthrough ducts which may by force of Vcircumstances be installed with a trap or downward grade, which under -ordinary circumstanccs'would impede, if notent'irely stop, the iiow of warm air; .Owing,`

however, to thetapered construction of the tubes e the heated air within cannot exhaust downward, but by its own expansion is forced through the ducts, which may be placed at any point in the surrounding walls o.

The front of the furnace 'u is constructed of the ordinary form, and the re and ash-pit doors fw andino located in the proper position for communicating with thevfire-box and ashrandtwoseries of vertically-disposedair-tubes passing throughsaid structure, one series of said tubes located adjacent to the lire-box and the other remote therefrom, all of said tubes being provided with webs and those remote described and 'as iliustmted` in said plates,- one series of said tubes located ad-N jacent. to the fire-box vand the otherremote therefrom,`all of said tubes being Vprovided -with webs and those remoterfrom the {ire-box provided with baffle-plates also;

et. A furnace, consisting of thetop andbottom plates provided with'openings, a tire-box having communication with said plates, and

two series Vof vertically disposed airtubes .passing through'said plates, one series of said tubes located adjacent to the fire-box. and the other remote therefrom, all of said tubes being :provided with webs and those remote Vfrom. thefire-box provided with baie-pl-atesalso.

5. A f urnacecomprisingthe twoliiat plates .provid ed with openings, andtwo series of vertically-disposed air -tubes passing-through said plates, one series of said tubes located 'adjacent to the tire-box and the other remote therefrom, all of saidrtubes being'provided with webs and .those remote'from the fire-box provided with bafiie-plates also.

j A j DAviD A. namens,

Witnesses :V y f ALBERT STRITMATTER C. H. Wind f 

